Messages in this thread | ![/](/images/icornerl.gif) | | Date | Tue, 18 Aug 2009 18:35:32 +0800 | From | Amerigo Wang <> | Subject | Re: [Patch 8/8] kexec: allow to shrink reserved memory |
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KAMEZAWA Hiroyuki wrote: > On Tue, 18 Aug 2009 14:31:23 +0800 > Amerigo Wang <amwang@redhat.com> wrote: > >>> It's hidden from the system before mem_init() ? >>> >>> >> Not sure, but probably yes. It is reserved in setup_arch() which is >> before mm_init() which calls mem_init(). >> >> Do you have any advice to free that reserved memory after boot? :) >> >> > > Let's see arch/x86/mm/init.c::free_initmem() > > Maybe it's all you want. > > - ClearPageReserved() > - init_page_count() > - free_page() > - totalram_pages++ >
Just FYI: calling ClearPageReserved() caused an oops: "Unable to handle paging request".
I am trying to figure out why...
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